P0532 Code - A/C Refrigerant Pressure Sensor Circuit Low Input

What Does P0532 Mean?

OBD-II Code Cooling fans may stay on all the time is defined as a A/C Refrigerant Pressure Sensor "A" Circuit Low

The engine control module (PCM) uses pressure sensors to control proper operation of the A/C System. When the PCM detects an irrational signal from the sensor, it will set code P0532.

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What are the common causes of P0532 ?

The most common cause of this code being stored is due to a low freon condition in the air conditioning system. Other causes can include excessive system pressure, a faulty a/c refrigerant pressure switch (there are typically between 1 and 4 in a system, depending upon manufacturer), faulty electrical connectors, damaged, shorted, or open wiring, or a faulty climate control head.

How do you troubleshoot P0532 ?

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.



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